Elastomers: Chloroprene, CPE, Glycine

Showa Denko Chloroprene

 

 

Showa Denko Chloroprene (CR) is a synthetic rubber which is manufactured via polymerization of chloroprene monomer. It is characterized by a well-balanced profile of properties:

  • exceptional resistance to weather, sun, ozone, and abrasion
  • good resilience
  • gas impermeable
  • resistant to heat, oil and flames
  • functions well at low temperatures
  • good electrical properties

Showa Denko Chloroprene is available in solid form as well as liquid dispersion. Showa Denko Europe GmbH offers a great variety of different grades to customers in Europe.

 

For detailed information, please download our Grade Selection Guide here.

 

Product Group Grade Mooney Viscosity
[ML 1+4, 100°C]
 Crystallization Rate
Standard W 42-51 Medium
WHV 109-130 Medium
WHV100 95-105 Medium
Sulfur-modified  GN 42-59 Medium
 GW 37-49 Slow
Crystallization Resistance WXJ 42-51 Very slow
SND5 67-76 Very slow
SND8 32-37 Very slow
WRT 42-51 Extremely slow
WD 100-120 Extremely slow
Extrusion & Calendering WB 42-51 Medium
WXK 73-89 Very slow
WXKT 106-117 Very slow
SND37 73-89 Very slow
TW 42-51 Medium
TW100 85-102 Medium
SND22 42-51 Very slow
SND48 85-100 Very slow
TRT 42-51 Extremely slow
 Low Mold Fouling  WK 42-51 Medium
 WXJK 42-51 Very slow
 SND35 63-73 Extremely slow
SND43 78-88 Extremely slow
SND45 60-73 Extremely slow
Adhesives W 42-51 Medium
WHC 109-130 Medium
WHV100 95-105 Medium
WHV140 86-130* Medium
WXJ 42-51 Very slow
WRT 42-51 Extremely slow
AC 31-43* Very fast
ADS 10-35* Very fast
AD 33-46* Very fast
AF 45-115** Slow
AG 80-130 Medium-slow

* Brookfield viscosity of 5% raw polymer solution in toluene at 25°C, [mPas]

** Brookfield viscosity of 10% raw polymer solution in toluene/hexane (60/40 vol/vol) at 25°C, [mPas]

 

 

 

 

 

 

For detailed information, please download our Grade Selection Guide here.

 

Grade Polarity Solid Content
[%]
Gel Content Crystallization Rate
400 Anionic 50 Medium Extremely fast
750 Anionic 50 Medium Extremely slow
752 Anionic 50 Medium Extremely slow
753 Anionic 50 Medium Extremely slow
650 Anionic 60 Medium Extremely slow
654 Anionic 59 Low Low
842A Anionic 50 High Very slow
671A Anionic 59 Med-High Medium-Slow
AE101 Non ionic 59 Med-High Medium-Slow
572 Anionic 50 HIgh Fast
571 Anionic 50 High Slow
115 Non ionic 47,5 Low Slow
SD77S Anionic 55 Sol (no gel) Very fast
SND57 Anionic 58 Sol (no gel) Medium
SD78 Anionic 60SD100 Med-High Fast-Medium
SD100 Anionic 55 Sol (no gel) Extremely fast

 

Typical applications for liquid dispersions

  • water based adhesives
  • dipped goods, such as gloves or balloons
  • waterproof coatings for the construction industry

 

Typical applications for solid grades

  • solvent borne adhesives
  • anti-vibration engine mounts
  • wire and cable, gaskets, boots, seals
  • moulded and extruded goods
  • foamed sheets for wet suits or laptop covers
  • bearing pads for bridge or road construction
  • belts and hoses for automotive and general industry

 

Showa Denko started the production of Chloroprene Rubber at the Kawasaki plant, approximately 20km south of Tokyo, in 1963. Since then, we developed a great variety of grades which meet our customers’ requirements.

In 2002, Showa Denko started selling the Showa Denko Chloroprene to export markets, to Europe since 2004. Today, we have acquired high reputation with our customers due to excellent product quality and a well established network of distribution and logistics partners.

With our warehouse in Hamburg, we ensure improved product availability and short lead times for our customers in Europe.

Elaslen™ (CPE)

 

 

Elaslen™ is Showa Denko’s trade name for Chlorinated Polyethylene (CPE). It is a thermoplastic polymer, manufactured by chlorinating high density Polyethylene (HDPE).

Elaslen™ is produced at our plant in Kawasaki, Japan, since 1968.

Elaslen™ shows excellent flexibility even at low temperatures, weatherability, heat aging resistance, flame retardancy, color stability, compression set resistance, electrical insulation properties (volume resistivity up to 4 x 1016 [Ω·cm]), as well as oil and chemical resistance.

Elaslen™ is offered in powder form.

 

For detailed information, please download our Grade List here.

 

Grade Specific Gravity Chlorine Content
[%]
Crystallinity
[J/g]
301MA 1.10-1.14 30.0-33.0 <2 (non-crystalline)
301AS 1.10-1.14 29.0-33.0 <2 (non-crystalline)
351AYS 1.12-1.19 32.0-37.0 <2 (non-crystalline)
401AY 1.18-1.22 37.5-41.5 <2 (non-crystalline)
302NAC 1.08-1.13 26.5-29.5 <2 (non-crystalline)
352NA 1.13-1.17 33.5-36.5 <2 (non-crystalline)
402NA 1.18-1.22 37.5-40.5 <2 (non-crystalline)
303A 1.10-1.14 30.0-33.0 <2 (non-crystalline)
353AY 1.14-1.18 33.0-36.0 <2 (non-crystalline)
252B 1.05-1.09 22,0-25,0 20
202KB 1.05-1.09 22.0-25.0 23
303BS 1.12-1.15 30.0-33.0 50
352GB 1.16-1.20 34.0-37.0 20
402B 1.19-1.23 37.5-41.5 10
404B 1.19-1.23 38.0-41.0 29

 

Due to its characteristics, Elaslen™ is suitable for a variety of applications, such as:

  • Wire & cable jackets
  • Automotive and industrial tubes and hoses
  • Gaskets, seals, bellows
  • Hand-rails
  • Roller covers
  • Magnetic rubber
  • Flame retardant for ABS (FR-ABS)
  • Impact modifier for PVC

The properties of CPE are mainly determined by 3 factors:

  • Chlorine content
  • Molecular weight
  • Crystallinity

ElaslenPic1

The different grades in our Elaslen™ product range are differentiated by the combination of these 3 factors. They have influence on the flame retardancy, mechanical strength, chemical resistance, and heat aging resistance.

ElaslenPic2

By these factors and their effects, the best suitable grade of Elaslen™ can be identified for each application.

Glycine

 

 

Glycine, also known as amino acetic acid, is an organic compound with the chemical formula NH2CH2COOH.

It is produced by Showa Denko in Kawasaki, Japan, since 1974.

Glycine is supplied as sweet tasting, odorless, white crystalline powder (state of solution: transparent and colorless).

 

Item Specification
Solubility in water 22.5g/100g (20°C)
Melting point 232-236°C (decomposition)
Chloride (as Cl) 0.021% max.
Heavy metals (as Pb) 20 ppm max.
Arsenic (as As2O3) 4.0 ppm max.
Loss on drying 0.30% max.
Residue on ignition 0.10% max.

 

  • Pet food additive
  • pH buffer (adhesives, cosmetics)
  • infusion solutions
  • Chelating agent
  • CMP slurry (chemical-mechanical planarization)

 

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